There are different called names for center joint.

It goes by rotary manifold, rotary union, center swivel, and swivel joint.

On hydraulic excavators, the center joint makes it possible for the housing to turn without affecting the flow of pressurized hydraulic fluid to the travel motors.

Sometimes, the travel motor final drive will act without power.

And you may think it is necessary to replace your final drive.

But wait a minute. You should check your center join first.

Sometimes a problem with the center joint can affect the performance of your final drives.

When the center joint seals start leaking, after a while, the hydraulic motors may no longer be receiving all the hydraulic fluid they need.

Thus the hydraulic motor shows powerless.

Sonka Company offers high-quality products and outstanding OEM service.

HQPA stands for High Quality Product Assurance!

The TPU seal raw material is from HUNTSMAN, LANXESS, BASF, Parker. PTFE Seal is using raw material DAIKIN imported from Japan.

At present, Sonka Company has established long-term relationship with many foreign companies. To

choose the seals of Sonka Company is the assurance of the quality.